THERE are more than just chads hanging in South Beach – a lot of celebs like to hang there, too.

Robert De Niro and Marisa Tomei will join an already crowded field of famous restaurant owners that includes Cameron Diaz, Gloria Estefan and Ricky Martin. De Niro is actually opening two eateries simultaneously in the Shore Club on Collins Avenue with his pals Nobu Matsuhisa and Richie Notar.

The first is the much-ballyhooed Nobu, now slated to open in February, and a Mediterranean place called Sirena.

“It means mermaid in Italian,” says Notar. “Sirena will have Nobu’s influence, and will be the first time he’ll have a chance to work with cheese.”

Tomei, meanwhile, has inked a deal with chef Robert Oliver to open an eatery called Suva, after the capital of Fiji.

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Compared to last year, New Year’s Eve celebrations in some of Manhattan priciest restaurants will be a relative bargain.

“It’s not going to be anything like last year,” Glenn Vogt, general manager of Windows on the World, told Nation’s Restaurant News. “We’re going to charge a lot less money, and we’re going to be able to because we’re going to get our suppliers to charge us a normal rate.”

Whereas last year, diners forked over $2,000 per person, this year the restaurant is charging $275 a pop and $350 at Wild Blue, a more intimate restaurant.

Tavern on the Green has dropped its price from $990 to $490 for their cushiest seating.

Likewise for Daniel, which sold its seats for $1,250 last year and is charging $390 for the six-course offering this year. Owner Daniel Boulud is also turning the lounge into a swinging nightclub for that evening.